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Chapter 3
Maintaining the Server
In
Table
this combination.
Table 3-3
Rear Power Supply LED States
Green PSU Status LED State Amber PSU Fault LED State Event
•
Solid on
•
Blinking
Off
•
Off
•
•
Blinking
•
Blinking
Blinking
•
Blinking
•
•
Solid on
•
Blinking
Blinking
•
Solid on
•
•
Solid on
•
Blinking
OL-32474-01
3-3, read the status and fault LED states together in each row to determine the event that cause
•
Off
•
Off
Off
•
On
•
•
Solid on
•
Solid on
Solid on
•
Solid on
•
•
Solid on
•
Solid on
Solid on
•
Blinking
•
•
Blinking
•
Off
12V main on (main power mode)
12Vmain off (standby power mode)
No AC power input (all PSUs present)
No AC power input (redundant supply active)
12V over-voltage protection (OVP)
12V under-voltage protection (UVP)
12V over-current protection (OCP)
12V short-circuit protection (SCP)
PSU fan fault/Lock (before OTP)
PSU fan fault/Lock (after OTP)
Over-temperature protection (OTP)
OTP warning
OCP warning
12V main off (CR slave PSU is in sleep mode)
Cisco UCS C240 M4 Server Installation and Service Guide
Status LEDs and Buttons
3-7
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